Receptacle for window sash pivot lock



May 25, 1965 1.. E. PETERS 3,184,784

RECEPTACLE FOR WINDOW SASH PIVOT LOCK 2 Sheets-Sheet 1 Filed Feb. 8, 1962 INVENTOR.

y 5, 1965 L. E. PETERS 3,184,784

RECEPTACLE FOR WINDOW SASH PIVOT LOCK Filed Feb. 8, 1962 2 Sheets-Sheet 2 INV EN TOR.

United States Patent M 3,184,784 RECEPTACLE FOR WINDGW SASH PIVOT LOCK Lowell E. Peters, 4500 Reading Road, Cincinnati 29, Ohio Filed Feb. 8, 1962, Ser. No. 171,955 1 (Ilaim. ((11. 16-171) This invention relates to window sash which are pivotable with respect to and removable from a Window frame.

In co-pending applications Serial No. 113,216 filed May 29, 1961 now Patent No. 3,055,062, and Serial No. 115,- 717 filed June 8, 1961 now Patent No. 3,055,063, a new pivot lock assembly has been described. That pivot lock assembly provides a connection between the balance springs in the window frame and the lower corners of the sash. The assembly includes a block which is slidable in the window frame and rotatable member in the block having a projecting head, the head being receivable in a slot in the window sash. The head and slot are cooperatively configurated so that the head is slidable into and out of the slot but is blocked from any substantial rotational movement with respect to the slot. Functionally it is important for the rotatable member to rotate with the sash as it is pivoted from the window frame in order to effect the locking of the assembly against the tension of the balance springs connected to the assembly.

An objective of the present invention has been to prevent inadvertent sliding apart of the rotatable member with respect to the sash. In many instances, it is necessary to swing the sash to fully pivoted position and to hold it in thatposition by means of the connection of the pivot lock assembly to the sash. At other times it is desirable to remove the sash completely.

In the earlier filed applications, the preventing of inadvertent removal of the sash was effected by providing a sliding plate covering the slot in the sash, the sliding plate being designed to capture the head of the rotatable member in the slot once it had been properly positioned. The present invention is directed in an improvement in the means for blocking the inadvertent removal of the sash from the pivot lock assembly. More specifically, the invention is directed to the provision of a receptacle for the lower corners of the sash having configurated slot which cooperates with the projecting head of the rotatable member to accomplish the following results without requiring additional moving parts; (a) easy introducing and removing of the sash with respect to the projecting head of the rotatable member, (b) blocking rotational movement of the head with respect to the slot and (c) preventing the inadvertent removal of the sash from the head of the rotatable member.

The several features of the invention will become more readily apparent from the following detailed description taken in conjunction with the accompanying drawings in which:

FIG. 1 is a fragmentary perspective view showing a window with which the invention is employed.

FIG. 2 is a disassembled perspective view of the pivot lock and receptacle.

FIGS. 3-7 are elevational views partly in section showing the stages of operation of the pivot lock with respect to the receptacle.

FIG. 8 is a cross sectional view taken along lines 88 of FIG. 3.

FIG. 9 is a cross sectional view taken along lines 99 of FIG. 6.

As shown in FIG. 1, the window comprises a frame 19 into which are mounted an upper sash 11 and a lower sash 12. Each sash is held in the frame 11 by side jamb weather stripping 13 and, at the lower corners of each sash, the sash is pivotally secured to the side jamb 3,184.74 Patented May 25, 1965 weather stripping at each of its lower corners by a pivot lock assembly of the type described in either of the copending applications referred to above. These pivot lock assemblies are upwardly biased by balance springs 14 disposed in each side jamb weather stripping. It is the function of the pivot lock assemblies to connect the balance springs to each sash so as to permit the sash to be raised and lowered with a minimum of force required. Additionally, the pivot lock assembly in cooperation with the side jamb weather stripping permits each sash to be pivoted inwardly as illustrated by the lower sash 12 of FIG. 1. In this position the sash and its glazing can conveniently be washed or, the sash may be permitted to stay in the pivoted position in order to permit the free flow of air into the room with which the window is associated. It should be understood that the upper sash 11 may also be pivoted in the same manner as the lower sash 12.

From time to time it may be advisable to permit the complete withdrawal of the sash from the window frame. While such withdrawal is of course desirable, it is equally desirable that the sash does not inadvertently fall from its pivot lock assembly when it is in the pivoted position. It is to this end that the present invention is directed.

The pivot lock assembly with which the present invention is useable may be of the type disclosed in either of the above identified applications or any comparable pivot lock having a projecting rotatable member, For the purpose of illustration, the pivot lock illustrated in my co-pending application Serial No. 115,717 is disclosed herein as cooperating with the receptacle of the present invention.

' As shown in FIG. 2, the pivot lock assembly comprises a sliding block 16 having a rotatable member 17. The rotatable member 17 has a projecting head 18 and a cam collar 19 provided with a cam surface 20. I The cam surface 20 cooperates with a similar cam surface 21 in the sliding block when the rotatable member 17 is in properly assembled position. The siding block and the rotatable member 17 are confined in a channel in the side jamb weather stripping 13, the cam collar 19 being captured by flanges which define the channel and the head 18 projecting outwardly from the channel. A balance spring having a hook end 22 is secured to a pin 23 by means of detent 24 and normally urges the block and rotatable member upwardly in the channel of the side jamb weather stripping. The head 18 of the rotatable member is normally in engagement with one of the lower corners of the sash and transmits the force of the spring 14 to the sash.

The cam surfaces 20 and 21 cooperate to force the cam collar apart from the block 16 when the rotatable member is rotated through 90" from a vertical position shown in FIG. 3 to :a horizontal position such as is shown in FIG. 6. The spreading apart of the two members locks the sliding block and the rotatable member in the side jamb channel against the force of the balance spring 14.

The lower corner on each side of the sash is provided with a slot to receive a receptacle 28. The receptacle 28 has two bores 29 theret-hrough by Which the receptacle may be secured to the sash.

The receptacle is in the form of a U-shaped block having an outer straight'leg 3t) and an inner leg 31 which M define a hook-shaped opening 33. The hook-shaped opening has an entry portion 34 which is flared outwardly so as to conveniently receive the projecting head 18 of the rotatable member. Communicating with the entry portion is a passageway portion 35 and a barb portion 36 formed by an angulated surface. The passageway portion permits the convenient sliding of the head 18 into the opening 33 and the barb portion serves to retain the head 18 of the rotatable member against inadvertent withdrawal, all in a manner to be explained in detail below.

As can best be seen by referring to FIGS. 3-7, the head 18 of the rotatable member has a configuration which matches the configuration of barb portion 36 of the hookshaped opening. It should be appreciated that other configurations of the head 18 and the barb portion 36 can be employed satisfactorily as long as they meet the three functional requirements of easy introduction and removal, blocking rotatable movement and preventing inadvertent removal.

The manner in which the elements cooperate. to produce the desired functions is illustrated in FIGS. 3-7. In FIG. .3 the head of the rotatable member is vertically oriented which, as can be seen from'the cross sectional view of FIG. 8, leaves the block 16 free to slide in the side jamb channel. As the sash 12 is pivoted inwardly,

the receptacle 28 pivots with respect to the head 18 about a point indicated at 38.

In the first stage of the pivotal movement the sash swings through an angle of approximately 40 until the r barb portion 36 of the opening 33 is brought into mating engagement with the head 18 as illustrated in FIG. 4. Thereafter, because of the mating configurations referred to above, the receptacle 28 is no longer free to rotate with respectto the head 18. When the position of FIG. 4 is attained, the receptacle applies a force couple to the head 18 in the direction of the arrows. The further swinging of the sash 12 through an additional angle of vapproxi- 1 '30 mately 90 brings the component to the position shown in FIG. 5 in which the rotatable member has been pivoted from a vertical position of FIGS.- 3 and 4 to a horizontal position of FIGS. 5 and 6. By referring to the cross sectional view 'of FIG. 9, it can be seen that the pivotal movement of the rotatable member has displaced the camoutwardly of earn collar 19 against the channel flanges indicated at 39 to effect the locking of the block and rotatable member Within the channel of the side jamb weather stripping.

If it is desired to leave the sash in an 'openposition, inadvertent removal of the sash with respect to the head 18 of the rotatable member is blocked by engagement of the head 18 witha surface 40 of barb portion 36. The

only way in which the sash can be removed is byraising 7 the sash to a horizontal position illustrated in-FIGS. 6 and 7, which brings the passageway portion .35 in alignment with the head 18. The passageway portion is wide enough to permitthe receptacle 28 and sash 12 to a be freely withdrawn as shown in FIG. 7'.

The return of the sash to the desired position of engagernent with the head 18 of'the rotatable mer'nberalso is easily effected merely by holding the sash in a horizontal position and thrusting it toward the head 18 of the rotatable member on each side of the window frame. The flared portion 34 of the receptacle serves as a tapered guide or funnel to bring the head 18 into proper engagement with the opening 33 of the receptacle. The upward pivotal movement of the sash toward aclosed position causes the receptacle 30 to apply a force couple in the direction-of the arrows shown in FIG. 6and rotates the rotatable member through an angle of to bring it to its vertical, unlocked position of FIG. 3.

I claim:

A window comprising a frame, :a sash pivot lock for pivoting a sash to said frame and locking balance springs in a stressed condition upon pivoting, said pivot lock being slidably mounted in said frame, said pivot lock having a rotatable'member terminating in .a projecting flat head of generally rectangular, cross section, a sash slidably mounted in said frame, a receptacle, in said sash for receiving the head of said pivot lock, said receptacle'comprising:

a U-shapedmember having two legs and a bight portion the outer surface in said U-shaped member being seated in said sash, V theinner surface of .a first leg of said U shaped member being straight to facilitate sliding introduction and removal of the head of said rotatable member,

the inner surface of a second leg of said U-shaped member having a notch angulated with respect to the inner surface of said first leg said notch being configurated to receive and block inadvertent removal of said head of said rotatable member, said, opening blocking .full rotation of said rotatable member therein.

References Qited by the Examiner UNITED STATES'PATENTS' DDNLEY J.STOCKING,,Primary Examiner. 

